Portable hoister.



No. 823,417. PATENTED JUNE 12, 1906.

A. LAMBERT. PORTABLE HOISTER. APPLICATION FILED JULY 28,1905.

4 SHEETS-SHEET l.

No. 823,417. PATENTED JUNE 12, 1906.

A. LAMBERT.

PORTABLE HOISTER. APPLIOATION FILED JULY 28.1905.

4 SHEETS-SHEET 2.

No. 823,417. PATENTED JUNE 12, 1906.

' A. LAMBERT.

PORTABLE HOISTER.

APPLICATION FILED JULY 28.1905.

4 SHEETS-SHEET 8.

A. LAMBERT.

PORTABLE HOISTER. APPLICATION FILED JULY 29.1905.

PATENTED JUNE 12, 1906.

4 SHEETS,SHBET 4.

ANDREW, a. munm cm WOYD-LIYNOGRAPHERS e To UNITED sTATEs PATENT OFFICE.

Specification of Letters Patent.

Patented June 12, 1906.

Application filed July 28,1905. Serial No. 271,588.

To all whom it may concern-.-

Be it known that I, AsHER LAMBERT, a citizen of the United States, residing at No. 1 Johnsonavenue, Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Portable Hoisters, fully described and represented in the following specification and the accompanying drawings, forming a part of the same. This invention relates to that class of portable power hoisters operated by steam or electricity which when used with a derrick for turning the derrick post and for hoisting heavy loads is commonly constructed with two drums of relatively small diameter, so as to turn the derrick slowly and have the requisite power to lift the load. .When the hoister is used for cableways, it is built with larger drums, so as to haul the carriage or load along upon the cable quickly and to hoist the load with rapidity as only a light load is lifted.

So far as I am aware no hoister has heretofore been constructed which can be used for both these purposes except that shown in my Patent No. 724,890; but it has been necessary when a contractor was operating a cableway to purchase a special hoisting-machine at great expense provided with large drums adapted only for use with the cableway, and the machine thus purchased could not be used. for operating a derrick, although the greater part of a contractors work requires derricks and only a small proportion required the use of cableways.

The present invention comprises a convertible hoister adapted for use with cableways and derricks and having bearin s upon the hoister-frame with large and smal drums fitted by their shafts interchan eably to such bearings, so that the hoister can e used at one time with large drums and at other times with small drums or with a large and small drum together, if required. A plurality of drums of difierent sizes may be fitted interchangeably to each shaft, or each drum may be rovided permanently with its own shaft, an the shafts fitted interchangeably to the same bearings, as either construction permits the changing of the drums with facility.

Such a hoisting-engine is readily convertible from one use to the other by removing one or more drum-shafts from the bearings and placing another or others therein or by fitting another interchangeable drum to the same shaft. By this construction the use of a hoisteris greatly extended, and a contractor can fit the frame with the larger drums for use upon a cableway, and when the ditching or other work requiring a cableway is completed he can with very little labor change the drums for others of smaller size .to use with a pile-driver, a derrick, or a scow oper ating as a lighter. With a hoister adapted to such wide range of work a contractorcan rent out the hoister when not required for his own use to be employed in any way that is requisite.

The invention will be understood by reference to the annexed drawings, in which- Figure 1 is a perspective view of a steam-, hoister provided with one large and one small drum, which adapts it for use upon a cableway with long haul and short lift for the load. Fi 2 is a plan of the hoister-frame with the earings adapted for receiving the interchangeable drums. Fig. 3 is an elevation of one of the large drums and its shaft. Fig. 4 is a longitudinal section of the same. 5 shows one of the drum-shafts with only the drum and friction-driver, the drum being re-. moved therefrom; and Fig. 6 is an elevation of one of the small drums with its shaft.

A designates the frame of the hoister, and B a drivlng-shaft having a pinion C, so located as to engage the gear-wheels D upon both of the drum-shafts. vided at one side with bearings E and F and upon the opposite side with bearings E and F, and the drums are shown provided with shafts G, adapted to fit such bearings. A gear-wheel H 1s shown upon each shaft, with a wooden cone H attached at one side to form a friction-driver, such friction-drivers being made of uniform size upon all the gearwlieels, so as to fit the drums interchangeab Ilhe large drums are designated I and the small drums J, and each is furnished upon one end with a hollow friction-cone K, such cones being fitted interchangeably to the friction-drivers H. drum lies next one of the bearings E or F, which is provided with the usual thrustscrew 0 and thrust-collars L. Each shaft is provided at such end with grooves L, fitted to the collars L to prevent end movement, and with a thrust-pin M within the end of the shaft, which transmits the pressure of the thrust-screw O to the usual cross-key N, which presses against the outer end of the drum. The grooves L form collars L upon The frame is pro" The outer end of each the end of the shaft, as shown in Figs. 4 and 6, which engage the collars L in the bearings.

A hand-lever P is shown in Fig. 1 upon each of the thrust-screws, and the turning of such lever operates in the usual manner to crowd the drum toward the friction-driver and cause its rotation when desired. Inspection of Figs. 3 to 6 shows that the large and small drums may be fitted interchangeably to any of the shafts between the cross-key N and the gear-wheel H and that when thus mounted upon the shaft the cone K upon the drum would fit interchangeably the friction-driver upon the gear-wheel. The gear-wheel H is fitted against a shoulder upon the shaft to prevent it from shifting under the pressure of the thrust-screw, and the drums are removable fi"om the shaft (when the shaft is taken from its bearings) by removing the cross-key N. The hoister may thus be adapted for another use by changing the drum upon the shaft or sub stituting a shaft and drum, such as is shown in Figs. 3 and 4, for one previously used in the bearings on the hoister-frame.

It is immaterial to the present invention how the drums be forced against their friction-drivers, as the invention depends upon the interchangeability of the drums upon the hoister-frame and not upon the means for rotating the shafts or operating the friction devices.

By this invention hoisters already in use and adapted only for derrick or cableway work may be provided with interchangeable drums which adapt the same machine for both of these uses, and the utility of the machines is thus very greatly increased, so that the same machine can be utilized with cableways, pile-drivers, derricks, and lighters.

Having thus set forth the nature of the invention, what is claimed herein is 1. As an article of manufacture, a convertible hoister for cableways and derricks having a frame with bearings at opposite sides of the frame, and drums of different diameters with shafts fitted interchangeably to said bearings for shifting or hoisting the load at different rates of speed, as desired.

2. As an article of manufacture, a convertible hoister for cableways and derricks having a frame with a plurality of bearings at opposite sides of the frame, a plurality of shafts fitted to said bearings and provided each near one end with a gear-wheel and frictiondriver, and drums of different diameters fitted interchangeably to said shafts and friction-drivers. I

3. As an article of manufacture, a convertible hoister for cableways and derricks having a frame with a plurality of bearings at opposite sides of the frame, a plurality of shafts fitted to said bearings and provided each near one end with a gear-wheel and frictiondriver and near the opposite end with a crosskey and thrust-pin, and drums of different diameters fitted interchangeably to said shafts and friction-drivers, and extending interchangeably to the cross-keys, whereby the drums may be connected with the friction-drivers when the shafts are fitted to the bearings and the thrust-screws are operated.

4. As an article of manufacture, a convertiible hoister for cableways and derricks hav ing a frame with bearings at opposite sides of the same, the bearings at one side bein provided each with a thrust-screw, and rums of different diameters with shafts fitted interchangeably to said bearings, the larger drums having a concave face and the smaller drums being cylindrical, and the drums thus adapted respectively for hauling the load in cableways and derricks.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

- ASHER LAMBERT. Witnesses:

E. M. BURDIOK, I THOMAS S. CRANE. 

